Solvent-induced formation of two novel mononuclear and dinuclear copper(II) complexes: Synthesis, structure and properties

Two new complexes, [Cu(L)2(CH3COO)2(H2O)] · 6H2O (1) and [Cu2(L)2(CH3COO)4] · 2C2H5OH (2) (where LN-(4-chlorophenyl)-3-pyridinecarboxamide), have been synthesized. Solvents control the coordination mode to form different supramolecular assemblies. Complexes 1 and 2 represent 3D and 2D networks, respectively. Interestingly, two scarcely reported cyclic water tetramers with C2h and D2h symmetries simultaneously populated in the channels of 1 have been observed.